Contribution of old wheat varieties to climate change mitigation under contrasting managements and rainfed Mediterranean conditions

摘要: Abstract Agriculture represents about 11% of global anthropogenic greenhouse gas emissions (GHGe). Many climate change mitigation strategies have been evaluated in Mediterranean agroecosystems, including their soil organic carbon sequestration potential. High residue yielding old varieties could constitute a useful alternative, especially for farming, which lacks specific genetic material. In this study, and modern wheat were under (ORG) conventional (CON) management during 3-year field experiment rainfed conditions. Field measurements biomass components, literature emission factors, modeling combined an attributional Life Cycle Assessment, order to estimate GHGe from “cradle farm gate”. The resulting yield-based footprints significantly lower than those both CON management, decreasing 263 144 g CO2e kg−1, ORG 29 to −43 g kg−1. Our results indicate that cereal cropping systems should focus on diminishing machinery fertilizer use, promoting sequestration. combination can promising strategy these systems, as low area-scaled are with enhanced good yield performance